The biggest starquake ever recorded resulted in oscillations in the X-ray emission from the shaking neutron star. Astronomers hope these oscillations will crack the mystery of what neutron stars are made of.

On December 27, 2004, several satellites and telescopes from around the world detected an explosion on the surface of SGR 1806-20, a neutron star 50,000 light years away. The resulting flash of energy -- which lasted only a tenth of a second -- released more energy than the Sun emits in 150,000 years.

Combing through data from NASA's Rossi X-ray Timing Explorer, a team of astronomers has identified oscillations in the X-ray emission of SGR 1806-20. These rapid fluctuations, which began 3 minutes after the starquake and trailed off 10 minutes later, had a frequency of 94.5 Hertz.

"This is near the frequency of the 22nd key of a piano, F sharp," said Tomaso Belloni from Italy's National Institute of Astrophysics.

Powered by DCForum+ Version 1.1 Copyright 1997-2002 DCScripts.com
Software has been extensively modified by the DU administrators

Important Notices: By participating on this discussion
board, visitors agree to abide by the rules outlined on our Rules
page. Messages posted on the Democratic Underground Discussion Forums are the
opinions of the individuals who post them, and do not necessarily represent
the opinions of Democratic Underground, LLC.